<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var num = prompt("请输入一个数字");
      var count = 0; // 记录因数的个数
      // 找 num  的因数
      for (var i = 1; i <= num; i++) {
        if (num % i == 0) {
          // 说明是因数
          console.log(i);
          count++;
        }
      }
      console.log("因数个数", count);
    </script>
  </body>
</html>
